Shibboleth comma

Interval information

Ratio	1953125/1889568
Factorization	2-5 × 3-10 × 59
Monzo	[-5 -10 9⟩
Size in cents	57.27342¢
Name	shibboleth comma
Color name	y9-2, tritriyo negative 2nd
FJS name	[math]\displaystyle{ \text{ddd}{-2}^{5,5,5,5,5,5,5,5,5} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	41.747
Weil norm (log2 max(n, d))	41.7947
Wilson norm (sopfr(nd))	85
Comma size	medium
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The shibboleth comma (monzo: [-5 -10 9⟩, ratio: 1953125/1889568) is a medium 5-limit comma measuring about 57.3 cents. It equates nine just minor thirds ((6/5)⁹) with a double compound fourth (16/3), or a stack of five 25/18's with 5/1. Tempering out this comma leads to the shibboleth temperament.